quasar | d9b33203556fafab59ac2a86ffc481da83dab9a29293639098cefd15fd686628

Resubmissions

14/03/2025, 13:03

250314-qacneavkv5 10

Analysis

max time kernel
140s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20250313-en
resource tags

arch:x64arch:x86image:win10v2004-20250313-enlocale:en-usos:windows10-2004-x64system
submitted
14/03/2025, 13:03

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General

Target

CleanerV2.exe
Size

3.1MB
MD5

e6aeb08ae65e312d03f1092df3ba422c
SHA1

f0a4cbe24646ad6bd75869ecc8991fd3a7b55e62
SHA256

74fc53844845b75a441d394b74932caa7c7ad583e091ec0521c78ebad718100e
SHA512

5cce681c2bfea2924516abab84028ebbd78194a4a9a83f9cfdcebdf88aba9e799b1e9ca859a0c68a2438c1c6b605120fc5f192db205173b36237512623514284
SSDEEP

49152:Cvht62XlaSFNWPjljiFa2RoUYIDURJ6XbR3LoGdG6THHB72eh2NT:CvL62XlaSFNWPjljiFXRoUYIDURJ6p

Score

10^/10

quasar cleanerv2 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

CleanerV2

192.168.4.185:4782

Mutex

1607a026-352e-4041-bc1f-757dd6cd2e95

Attributes

encryption_key
73BCD6A075C4505333DE1EDC77C7242196AF9552
install_name
Client.exe
log_directory
Clean
reconnect_delay
3000
startup_key
CleanerV2
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/2860-1-0x00000000002F0000-0x0000000000614000-memory.dmp	family_quasar
behavioral2/files/0x0009000000024168-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
5148	Client.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
720	schtasks.exe
2380	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2860	CleanerV2.exe
Token: SeDebugPrivilege	5148	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
5148	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
5148	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5148	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2860 wrote to memory of 720	2860	CleanerV2.exe	84
PID 2860 wrote to memory of 720	2860	CleanerV2.exe	84
PID 2860 wrote to memory of 5148	2860	CleanerV2.exe	86
PID 2860 wrote to memory of 5148	2860	CleanerV2.exe	86
PID 5148 wrote to memory of 2380	5148	Client.exe	87
PID 5148 wrote to memory of 2380	5148	Client.exe	87

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\CleanerV2.exe
"C:\Users\Admin\AppData\Local\Temp\CleanerV2.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2860
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "CleanerV2" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:720
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5148
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "CleanerV2" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2380

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
e6aeb08ae65e312d03f1092df3ba422c

SHA1
f0a4cbe24646ad6bd75869ecc8991fd3a7b55e62

SHA256
74fc53844845b75a441d394b74932caa7c7ad583e091ec0521c78ebad718100e

SHA512
5cce681c2bfea2924516abab84028ebbd78194a4a9a83f9cfdcebdf88aba9e799b1e9ca859a0c68a2438c1c6b605120fc5f192db205173b36237512623514284

Download Submit
memory/2860-0-0x00007FFEDE663000-0x00007FFEDE665000-memory.dmp

Filesize
8KB

Download
memory/2860-1-0x00000000002F0000-0x0000000000614000-memory.dmp

Filesize
3.1MB

Download
memory/2860-2-0x00007FFEDE660000-0x00007FFEDF121000-memory.dmp

Filesize
10.8MB

Download
memory/2860-9-0x00007FFEDE660000-0x00007FFEDF121000-memory.dmp

Filesize
10.8MB

Download
memory/5148-10-0x00007FFEDE660000-0x00007FFEDF121000-memory.dmp

Filesize
10.8MB

Download
memory/5148-11-0x00007FFEDE660000-0x00007FFEDF121000-memory.dmp

Filesize
10.8MB

Download
memory/5148-12-0x000000001D530000-0x000000001D580000-memory.dmp

Filesize
320KB

Download
memory/5148-13-0x000000001D640000-0x000000001D6F2000-memory.dmp

Filesize
712KB

Download
memory/5148-14-0x00007FFEDE660000-0x00007FFEDF121000-memory.dmp

Filesize
10.8MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads